unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, ComCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    Splitter1: TSplitter;
    Panel2: TPanel;
    TreeView1: TTreeView;
    Memo1: TMemo;
    procedure TreeView1Change(Sender: TObject; Node: TTreeNode);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

//當選中的節點進行了改變響應
procedure TForm1.TreeView1Change(Sender: TObject; Node: TTreeNode);
begin
     //先把原先的文本清除
     Memo1.Clear;

     //顯示與選中節點相關的內容
     Memo1.Lines.Add('您選中了'+TreeView1.Selected.Text+'節點。');
end;

end.